Archer with warring house's heraldic badge back-to-front (4)
I believe the answer is:
eros
'archer' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for eros that I've seen before include "God of love - example of 1 down" , "Greek name of Cupid" , "divinity" , "capital statue" , "London landmark" .)